<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@3.4.0"></script>
</head>

<body>
    <div id="app">
        <h1> {{ message }}</h1>
    </div>
    <script>
        const { createApp } = Vue;
        const App = {
            data() {
                return { message: 'Hello Vue3!' }
            },
            methods:{

            },
            computed:{

            },
            mounted(
            ){
                
            },
        }
        const app = createApp(App).mount('#app');
    </script>
</body>

</html>